Opening and closing core mold with surface compounded with heat insulation layer and machining method of opening and closing core mold

Abstract

The invention relates to an openable and closable core mold with a surface compounded with a heat insulation layer and a machining method of the openable and closable core mold, and relates to the technical field of pipe machining core molds. The outer surface of the core mold pipe is coated with a resin layer, and a runner pipe is arranged in the pipe wall of the core mold pipe; the heating assembly is connected with the runner pipe and used for heating the interior of the pipe wall of the core mold pipe. Production of the winding pipe can be facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of pipe processing core molds, and in particular to an openable and closable core mold with a surface composite heat insulation layer and a processing method thereof. Background Art

[0002] The openable and closable core mold is a mold used to produce wound pipe products. When producing wound pipes, the surface of the core mold needs to be heated to 200°C, and then the polyethylene and polypropylene materials used to produce the wound pipes are coated on the surface of the core mold. The surface of the core mold is then heat-dissipated to allow the wound pipe to cool and form, and finally the openable and closable core mold is used for rapid demoulding.

[0003] At present, the openable and closable core mold is made of steel structure. The thermal conductivity of steel is high, so the heat on the surface of the core mold can be easily dissipated inward through the core mold. As a result, it is difficult to maintain the temperature of the surface of the core mold during the coating process of the winding pipe material, which brings inconvenience to the production of the winding pipe. Summary of the invention

[0004] In order to facilitate the production of wound pipes, the present application provides an openable and closable core mold of a surface composite thermal insulation layer and a processing method thereof.

[0005] In the first aspect, the present application provides an openable and closable core mold of a surface composite heat insulation layer, which adopts the following technical solution: A core mold with a composite heat insulation layer on the surface that can be opened and closed comprises a core mold tube and a heating component; the outer surface of the core mold tube is coated with a resin layer, and a circulation tube is arranged inside the tube wall of the core mold tube; the heating component is connected to the circulation tube and is used to heat the inside of the tube wall of the core mold tube.

[0006] By adopting the above technical solution, when processing the winding tube, the outer surface of the resin layer is first heated, and then the molding material of the winding tube is coated on the surface of the resin layer, and then the molding material of the winding tube is cooled to be formed, and finally demolding is performed to complete the processing of the winding tube.

[0007] The heat insulation effect of the resin layer itself is utilized to reduce the heat dissipated inward through the core mold tube, thereby avoiding the problem of the surface temperature of the resin layer decreasing during the material coating process of the winding pipe, thereby requiring reheating. At the same time, the heating component is used for auxiliary heating, which not only improves the heating efficiency, thereby improving the production efficiency of the winding pipe, but also heats and insulates the resin layer during the coating process of the molding material of the winding pipe, further avoiding the problem of needing reheating, thereby facilitating the production of the winding pipe.

[0008] Optionally, the heating component includes a first water tank, a first pipe, a second water tank, a second pipe and a water heater; oil is provided in the first water tank; both ends of the first pipe are respectively connected to the first water tank and the circulation pipe; oil is also provided in the second water tank; both ends of the second pipe are respectively connected to the second water tank and the circulation pipe; the water heater is installed on the first pipe.

[0009] By adopting the above technical solution, when heating the inside of the core mold tube, the water heater is started to heat the oil and transport it to the circulation pipe. The hot oil flows along the circulation pipe inside the tube wall of the core mold tube, thereby heating the inside of the tube wall of the core mold tube.

[0010] Optionally, it also includes a cooling component, which includes a third pipe, a fourth pipe and a chiller; both ends of the third pipe are respectively connected to the second water tank and the circulation pipe; both ends of the fourth pipe are respectively connected to the first water tank and the circulation pipe; the chiller is installed on the third pipe; a first electric valve is installed on the second pipe; and a second electric valve is installed on the fourth pipe.

[0011] By adopting the above technical scheme, after the coating of the molding material of the winding pipe is completed, during the cooling and molding, the chiller is started to cool the oil and transport it to the circulation pipe. The cold oil flows along the circulation pipe inside the tube wall of the core mold tube to cool the inside of the tube wall of the core mold tube, thereby cooling the resin layer, assisting the cooling and molding of the winding pipe, improving the cooling and molding efficiency, and avoiding the problem of slow cooling and molding on the side of the winding pipe close to the resin layer due to the heat insulation effect of the resin layer, thereby facilitating the production and processing of the winding pipe.

[0012] Optionally, a skeleton component is arranged inside the core mold tube; the skeleton component is evenly arranged in several groups along the axis of the core mold tube; the skeleton component includes a first bone segment, a second bone segment and a third bone segment; the second bone segment is hinged to the first bone segment; the third bone segment is hinged to the second bone segment; the core mold tube includes a first tube segment, a second tube segment and a third tube segment; the resin layer is divided into three sections, and corresponds to the first tube segment, the second tube segment and the third tube segment respectively; the first tube segment is fixedly connected to the first bone segment; the second tube segment is fixedly connected to the second bone segment; the third tube segment is fixedly connected to the third bone segment; a driving component is arranged on the core mold tube, and the driving component is used to drive the first bone segment and the third bone segment to rotate.

[0013] By adopting the above technical solution, after the winding tube is cooled and formed, the first bone segment and the third bone segment are driven to rotate by the driving assembly, thereby driving the first tube segment and the third tube segment to rotate in a direction close to the axis of the core mold tube, so that the outer diameter of the core mold tube is reduced, which is convenient for demolding the formed winding tube, thereby facilitating the production and processing of the winding tube.

[0014] Optionally, the drive assembly is provided in several groups and corresponds one-to-one with the skeleton assembly, and the drive assembly includes a hydraulic cylinder, a fixed end of the hydraulic cylinder is hinged to the second bone segment, and a movable end of the hydraulic cylinder is hinged to the third bone segment.

[0015] By adopting the above technical solution, after the wound tube is cooled and formed, the hydraulic cylinder is driven to contract, driving the third bone segment to rotate, so that the third tube segment rotates in a direction close to the axis of the core mold tube.

[0016] Optionally, the driving assembly further comprises a connecting plate; two ends of the connecting plate are respectively hinged to the movable end of the hydraulic cylinder and the first bone segment.

[0017] By adopting the above technical solution, after the second bone segment rotates a certain distance, the hydraulic cylinder continues to contract, driving the connecting plate to pull the first bone segment to rotate toward the axis of the core mold tube, thereby driving the first tube segment to rotate toward the axis of the core mold tube.

[0018] Optionally, the resin layer expands when the temperature reaches 200°C.

[0019] By adopting the above technical scheme, when the outer surface of the resin layer is heated, the resin layer reaches 200°C and is in an expanded state; when the oil cools the inner wall of the core mold tube, the resin layer is rapidly cooled and the volume gradually shrinks. Since the resin layer itself has a certain heat insulation effect, the molding material of the winding tube on the surface of the resin layer is also cooled, but the cooling speed is slower than that of the resin layer. During the cooling process, the resin layer and the molding material of the winding tube are gradually separated, and a gap is generated between the two, thereby facilitating the demolding of the winding tube.

[0020] In a second aspect, the present application provides a method for processing an openable and closable core mold of a surface composite heat insulation layer, which adopts the following technical solution: A method for processing an openable and closable core mold of a surface composite heat insulation layer, comprising the following steps: S1 surface heating: heating the surface of the resin layer (2) to a temperature of 200° C., so that the resin layer (2) is in an expanded state; S2 material coating: coating the molding material of the winding tube onto the surface of the resin layer (2); S3 cooling: rapidly cooling the resin layer (2), so that while the winding tube is cooled and formed, the resin layer (2) is rapidly cooled and reduced in volume, thereby generating a gap between the resin layer (2) and the winding tube; S4 demoulding: adjusting the shape of the core mold tube (1) so that the outer diameter of the core mold tube (1) is reduced, and the formed winding tube is separated from the core mold tube (1).

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the resin layer and the heating assembly, the heat insulation effect of the resin layer itself is utilized to reduce the heat dissipated inward through the core mold tube, thereby avoiding the problem that the surface temperature of the resin layer decreases during the material coating process of the winding pipe, thereby requiring reheating. At the same time, the heating assembly is used for auxiliary heating, which not only improves the heating efficiency, thereby improving the production efficiency of the winding pipe, but also heats and keeps the resin layer warm during the coating process of the molding material of the winding pipe, further avoiding the problem of needing to reheat, thereby facilitating the production of the winding pipe; 2. By setting up a cooling component, the winding pipe is assisted in cooling and forming, the cooling and forming efficiency is improved, and the problem of slow cooling and forming on the side of the winding pipe close to the resin layer due to the heat insulation effect of the resin layer is avoided, thereby facilitating the production and processing of the winding pipe; 3. By setting the skeleton assembly and the driving assembly, when the winding tube is cooled and formed, the first bone segment and the third bone segment are driven to rotate by the driving assembly, thereby driving the first tube segment and the third tube segment to rotate in the direction close to the axis of the core mold tube, so that the outer diameter of the core mold tube is reduced, which is convenient for demoulding the formed winding tube, thereby facilitating the production of the winding tube; 4. A resin layer that expands at 200°C is used. When the outer surface of the resin layer is heated, the resin layer reaches 200°C and is in an expanded state. When the oil cools the inner wall of the core mold tube, the resin layer cools rapidly and the volume gradually shrinks. Since the resin layer itself has a certain heat insulation effect, the molding material of the winding tube on the surface of the resin layer is also cooled, but the cooling speed is slower than that of the resin layer. During the cooling process, the resin layer and the molding material of the winding tube are gradually separated, and a gap is generated between the two, thereby facilitating the demoulding of the winding tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 It is a side view of an embodiment of the present application.

[0023] Description of reference numerals: 1. core mold tube; 11. first tube section; 12. second tube section; 13. third tube section; 2. Resin layer; 3. Circulation pipe; 4. Heating assembly; 41. First water tank; 42. First pipeline; 43. Second water tank; 44. Second pipeline; 441. First electric valve; 45. Water heater; 5. Cooling assembly; 51. Third pipeline; 52. Fourth pipeline; 521. Second electric valve; 53. Chiller; 6. Skeleton assembly; 61. First bone segment; 62. Second bone segment; 63. Third bone segment; 7. Driving assembly; 71. Hydraulic cylinder; 72. Connecting plate. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-2 This application is described in further detail.

[0025] The present application embodiment discloses an openable and closable core mold of a surface composite heat insulation layer. Figure 1 and Figure 2 The openable and closable core mold of the surface composite heat insulation layer includes a core mold tube 1 and a heating component 4.

[0026] Reference Figure 1 The core mold tube 1 includes a first tube section 11, a second tube section 12 and a third tube section 13. The first tube section 11, the second tube section 12 and the third tube section 13 form a completed round tube. The outer surfaces of the first tube section 11, the second tube section 12 and the third tube section 13 are coated with a resin layer 2, and the resin layer 2 can be made of polyester resin. When the temperature reaches 200°C, the volume of the polyester resin expands.

[0027] Reference Figure 1 and Figure 2 A flow pipe 3 is arranged inside the tube wall of the core mold tube 1, and the flow pipe 3 passes through the first tube section 11, the second tube section 12 and the third tube section 13. The flow pipe 3 is a hose. A heating component 4 is connected to the connecting pipe, and the heating component 4 is used to heat the inside of the core mold tube 1.

[0028] When processing the winding pipe, the outer surface of the resin layer 2 is heated by an infrared heating device to make the resin layer 2 reach 200°C, and then the molding material of the winding pipe is coated on the surface of the resin layer 2 by a coating device. After the coating is completed, the molding material of the winding pipe is cooled by a cold air device to form it, and finally demolding is performed to complete the processing of the winding pipe.

[0029] When the outer surface of the resin layer 2 is heated, the resin layer 2 itself has a heat insulation effect, reducing the heat loss through the core mold tube 1. At the same time, the heating component 4 is in a working state, heating the inside of the core mold tube 1, and heating the resin layer 2 through heat transfer, which improves the heating efficiency on the one hand and prevents the heat on the surface of the resin layer 2 from being lost inward through the core mold tube 1 on the other hand.

[0030] Reference Figure 2 The heating assembly 4 includes a first water tank 41, a first pipe 42, a second water tank 43, a second pipe 44 and a water heater 45. The first water tank 41 is provided with oil. The two ends of the first pipe 42 are respectively connected to the first water tank 41 and one end of the circulation pipe 3. The second water tank 43 is also provided with oil. The two ends of the second pipe 44 are respectively connected to the second water tank 43 and the other end of the circulation pipe 3. A first electric valve 441 is fixedly installed on the second pipe 44. The water heater 45 is fixedly installed on the first pipe 42.

[0031] When the interior of the core mold tube 1 is heated, the water heater 45 is in operation, heating the oil in the first water tank 41 and transporting it to the circulation tube 3 through the first pipe 42. The heated oil flows along the circulation tube 3 through the interior of the tube wall of the core mold tube 1, thereby heating the interior of the tube wall of the core mold tube 1. Finally, the oil flowing out of the circulation tube 3 flows into the second water tank 43 through the second pipe 44.

[0032] Reference Figure 2 The circulation pipe 3 is connected with a cooling assembly 5, which includes a third pipe 51, a fourth pipe 52 and a chiller 53. The two ends of the third pipe 51 are respectively connected with the second water tank 43 and the other end of the circulation pipe 3. The two ends of the fourth pipe 52 are respectively connected with the first water tank 41 and the circulation pipe 3. The chiller 53 is fixedly installed on the third pipe 51. The fourth pipe 52 is fixedly installed with a second electric valve 521.

[0033] When the water heater 45 is working, the second electric valve 521 is closed and the first electric valve 441 is opened.

[0034] During the processing of the wound pipe, after the coating of the molding material of the wound pipe is completed, the outer surface of the molding material of the wound pipe is blown by the cold air equipment, and the wound pipe is cooled and formed. At the same time, the first electric valve 441 is closed, the second electric valve 521 is opened, and the chiller 53 is in working state, the oil in the first water tank 41 is cooled and transported to the circulation pipe 3 through the third pipe 51. The cooled oil flows along the circulation pipe 3 through the inside of the tube wall of the core mold tube 1, thereby cooling the inside of the tube wall of the core mold tube 1, thereby cooling the resin layer 2. Finally, the oil flowing out of the circulation pipe 3 flows into the first water tank 41 through the fourth pipe 52.

[0035] When the oil cools the inner wall of the core mold tube 1, the injection of oil causes the inside of the core mold tube 1 to cool rapidly, thereby causing the resin layer 2 to cool rapidly and its volume to gradually shrink. Since the resin layer 2 itself has a certain heat insulation effect, the molding material of the wrapped tube on the surface of the resin layer 2 is also cooling, but at a slower speed than the resin layer 2. During the cooling process, the resin layer 2 is gradually separated from the molding material of the wrapped tube, and a gap is generated between the two.

[0036] Reference Figure 1 , a skeleton assembly 6 is arranged on the core mold tube 1, and the skeleton assembly 6 is located inside the core mold tube 1. Several groups of skeleton assembly 6 are evenly arranged along the length direction of the core mold tube 1. The skeleton assembly 6 includes a first bone segment 61, a second bone segment 62 and a third bone segment 63. The first bone segment 61, the second bone segment 62 and the third bone segment 63 can form a complete circular ring. The lengths of the first bone segment 61, the second bone segment 62 and the third bone segment 63 are all less than half of the circumference of the circular ring formed by the three. The second bone segment 62 is hinged to the first bone segment 61, and the hinge axis is arranged parallel to the axis of the core mold tube 1. The third bone segment 63 is hinged to the second bone segment 62, and the hinge axis is arranged parallel to the axis of the core mold tube 1.

[0037] The first tube segment 11 corresponds to the first bone segment 61, and the first tube segment 11 and the first bone segment 61 are fixedly connected; the second tube segment 12 corresponds to the second bone segment 62, and the second tube segment 12 and the second bone segment 62 are fixedly connected; the third tube segment 13 corresponds to the third bone segment 63, and the third tube segment 13 and the third bone segment 63 are fixedly connected.

[0038] Reference Figure 1 , a driving assembly 7 is arranged on the core mold tube 1, and a plurality of driving assemblies 7 are evenly arranged along the length direction of the core mold tube 1. The driving assembly 7 corresponds to the skeleton assembly 6 one by one, and the driving assembly 7 includes a hydraulic cylinder 71 and a connecting plate 72. The fixed end of the hydraulic cylinder 71 is hinged to the crossbeam fixed on the second bone segment 62, and the hinge axis is arranged parallel to the axis of the core mold tube 1. The movable end of the hydraulic cylinder 71 is hinged to the third bone segment 63, and the hinge axis is arranged parallel to the axis of the core mold tube 1. The connecting plate 72 is an arc-shaped structure, and one end of the connecting plate 72 is hinged to the movable end of the hydraulic cylinder 71, and the hinge axis is in line with the movable end of the hydraulic cylinder 71 and the hinge axis of the third bone segment 63.

[0039] After the winding pipe is cooled and formed, the hydraulic cylinder 71 contracts, thereby driving the third bone segment 63 to rotate toward the direction close to the axis of the core mold tube 1, thereby driving the third pipe segment 13 to rotate toward the direction close to the axis of the core mold tube 1. After the third bone segment 63 rotates a certain distance, it also drives the connecting plate 72 to pull the first bone segment 61 to rotate toward the direction close to the axis of the core mold tube 1, thereby driving the first pipe segment 11 to rotate toward the direction close to the axis of the core mold tube 1, thereby reducing the outer diameter of the core mold tube 1, and then the formed winding pipe is separated from the core mold tube 1 by the lifting equipment.

[0040] The implementation principle of the openable and closable core mold of a surface composite heat insulation layer in the embodiment of the present application is: When processing the winding pipe, the outer surface of the resin layer 2 is first heated to 200° C. The resin layer 2 is in an expanded state. At this time, the first electric valve 441 is opened, the second electric valve 521 is closed, and the water heater 45 is started to heat the resin layer 2.

[0041] Then, the molding material of the winding pipe is coated on the surface of the resin layer 2. During this process, the water heater 45 is always in working state.

[0042] After coating is completed, while the molding material of the winding tube is cooled by the cold air device, the first electric valve 441 is closed, the second electric valve 521 is opened, the hot water machine 45 is turned off, and the cold water machine 53 is started to cool the resin layer 2. In the process of cooling and molding the winding tube, the resin layer 2 and the molding material of the winding tube are gradually separated, and a gap is generated between the two.

[0043] Finally, the hydraulic cylinder 71 contracts to drive the first pipe section 11 and the third pipe section 13 to rotate toward the axis of the core mold tube 1, thereby reducing the outer diameter of the core mold tube 1, and then the formed winding pipe is separated from the core mold tube 1 by lifting equipment.

[0044] The embodiment of the present application discloses a method for processing an openable and closable core mold of a surface composite heat insulation layer. The method for processing an openable and closable core mold of a surface composite heat insulation layer comprises: S1 surface heating: the surface of the resin layer 2 is heated by an infrared heating device, and cooperated with a water heater 45 to make the surface of the resin layer 2 reach 200° C., so that the resin layer 2 is in an expanded state; S2 material coating: the molding material of the winding pipe is coated onto the surface of the resin layer 2 through a coating device. During this process, the water heater 45 is still in working state; S3 Cooling: While the winding tube is being cooled and formed by the cold air device, the hot water machine 45 is turned off and the cold water machine 53 is started, so that the resin layer 2 is cooled quickly and the volume is reduced, and a gap is generated between the winding tube; S4 demoulding: the hydraulic cylinder 71 contracts, so that the first pipe section 11 and the third pipe section 13 of the core mold tube 1 rotate toward the axis of the core mold tube 1, so that the outer diameter of the core mold tube 1 is reduced, and finally the formed winding pipe is separated from the core mold tube 1 by the lifting equipment.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An openable and closable core mold for a surface composite heat insulation layer, characterized in that: The invention comprises a core mold tube (1) and a heating assembly (4); the outer surface of the core mold tube (1) is coated with a resin layer (2), and a circulation tube (3) is arranged inside the tube wall of the core mold tube (1); the heating assembly (4) is connected to the circulation tube (3) and is used to heat the inside of the tube wall of the core mold tube (1).

2. The openable and closable core mold of the surface composite heat insulation layer according to claim 1, characterized in that: The heating assembly (4) comprises a first water tank (41), a first pipe (42), a second water tank (43), a second pipe (44) and a water heater (45); oil is provided in the first water tank (41); two ends of the first pipe (42) are respectively connected to the first water tank (41) and the circulation pipe (3); oil is also provided in the second water tank (43); two ends of the second pipe (44) are respectively connected to the second water tank (43) and the circulation pipe (3); the water heater (45) is mounted on the first pipe (42).

3. The openable and closable core mold of the surface composite heat insulation layer according to claim 2, characterized in that: The cooling device also comprises a cooling assembly (5), the cooling assembly (5) comprising a third pipe (51), a fourth pipe (52) and a water chiller (53); the two ends of the third pipe (51) are respectively connected to the second water tank (43) and the circulation pipe (3); the two ends of the fourth pipe (52) are respectively connected to the first water tank (41) and the circulation pipe (3); the water chiller (53) is installed on the third pipe (51); the second pipe (44) is installed with a first electric valve (441); and the fourth pipe (52) is installed with a second electric valve (521).

4. The openable and closable core mold of the surface composite heat insulation layer according to claim 1, characterized in that: A skeleton component (6) is arranged inside the core mold tube (1); the skeleton component (6) is evenly arranged in a plurality of groups along the axis of the core mold tube (1); the skeleton component (6) comprises a first bone segment (61), a second bone segment (62) and a third bone segment (63); the second bone segment (62) is hingedly connected to the first bone segment (61); the third bone segment (63) is hingedly connected to the second bone segment (62); the core mold tube (1) comprises a first tube segment (11), a second tube segment (12) and a third tube segment (13); the resin layer (2 ) is divided into three sections, and corresponds to the first tube section (11), the second tube section (12) and the third tube section (13) respectively; the first tube section (11) is fixedly connected to the first bone section (61); the second tube section (12) is fixedly connected to the second bone section (62); the third tube section (13) is fixedly connected to the third bone section (63); and a driving assembly (7) is provided on the core mold tube (1), and the driving assembly (7) is used to drive the first bone section (61) and the third bone section (63) to rotate.

5. The openable and closable core mold of the surface composite heat insulation layer according to claim 4, characterized in that: The drive assembly (7) is provided in a plurality of groups and corresponds one to one with the skeleton assembly (6). The drive assembly (7) comprises a hydraulic cylinder (71), a fixed end of the hydraulic cylinder (71) being hinged to the second bone segment (62), and a movable end of the hydraulic cylinder (71) being hinged to the third bone segment (63).

6. The openable and closable core mold of the surface composite heat insulation layer according to claim 5, characterized in that: The driving assembly (7) further comprises a connecting plate (72); two ends of the connecting plate (72) are respectively hinged to the movable end of the hydraulic cylinder (71) and the first bone segment (61).

7. The openable and closable core mold of the surface composite heat insulation layer according to claim 4, characterized in that: The resin layer (2) expands when the temperature reaches 200°C.

8. A method for processing an openable and closable core mold of a surface composite heat insulation layer, based on the openable and closable core mold of the surface composite heat insulation layer according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1 surface heating: heating the surface of the resin layer (2) to a temperature of 200° C., so that the resin layer (2) is in an expanded state; S2 material coating: coating the molding material of the winding tube onto the surface of the resin layer (2); S3 cooling: rapidly cooling the resin layer (2), so that while the winding tube is cooled and formed, the resin layer (2) is rapidly cooled and reduced in volume, thereby generating a gap between the resin layer (2) and the winding tube; S4 demoulding: adjusting the shape of the core mold tube (1) so that the outer diameter of the core mold tube (1) is reduced, and the formed winding tube is separated from the core mold tube (1).

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